Polkowice-Sieroszowice.
In the Polkowice concession, copper mineralization covers an area 22.2 km2 at depths of 381 m to 893 m below surface. In the Sieroszowice concession, which is contiguous with Polkowice, copper mineralization extends over an area of 59.6 km2 at depths greater than 657 m below surface.

There are significant variations in the development of the Zechstein. In the western and southwestern part of the Polkowice mining area, the lowermost Zechstein is developed in the oxidized facies (Red Spotted Facies) characterized by red hematite-bearing shale and red patches and spots in the underlying White Footwall Sandstone. Copper sulphides and silver mineralization are absent, but gold and platinoids appear instead, at least at the transitional zone between the oxidized and sulphide facies. The Red Spotted Facies passes laterally (north and northeastwards) into the Cupriferous Shale, which is overlain by sulphide-bearing dolomite. The underlying White Footwall Sandstone is barren, except near the boundary with the Lubin mining area and in the northern and northwestern parts of Sieroszowice.

Structurally, the Polkowice area is divided into two domains by the Biedrzychowa Fault. This is an east-northeast striking scissor fault with a throw up to 50 m and with short northeasttrending splay faults. The area situated to the northwest and north of the fault, including the Red Spotted Facies, has a simple monoclinal structure with a gentle ........

Mining in KGHM Polska Miedz S.A. is performed by three mining Divisions: Lubin, Rudna and Polkowice-Sieroszowice.

The technology of mining the copper ore in all 3 mines is based on the room-and-pillar system with the use of blasting technology for ore extraction. This involves access and preparatory work, comprised of the excavation of a drift network on all sides of the site to be mined, cutting of the unmined rock mass with rooms and drifts separating a number of operating pillars, as well as extraction of the ore followed by the transport of the ore to underground dumping stations, where the large rocks are crushed and sifted through a grate, and then the crushed muck is transported to the storage areas near the shafts, from which it is transported to the surface by skip hoisting shafts.

The work related to mining of the copper ore is fully mechanised, in a 4-shift labour system, with the use of motorised mining rigs, most of which are equipped with air-conditioned cabins and systems supporting the work of the operators. Mining work is conducted in the following cycle: drilling the blasting holes with the support of motorised drilling rigs, loading blasting material into drilled holes by motorised blasting rigs, group blasting in mining divisions, followed by the ventilation of the areas blasted (from 30 minutes to 2 hours; in seismically- sensitive areas this time may be longer). The next stage involves the loading of the muck using motorised loader ........

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